BLUE TOPAZ- Laser cut All these topaz are irradiated and then heated. In the begining are colourless, then brown and finally blue. There is no way to distinguish a natural blue topaz from an irradiated one; anyway, this treatment is well know and accepted in the market. These stones are called “Laser cut” due to the lines engraved on the pavillion; all models are designed by me and cut in Thailand. While the supply last. Sold as pair Size:14x14x11mm. Weight:25.91 ct. CODE#2408